<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>html与css的结合方式</title>
<!--    <link rel="stylesheet" href="css/a.css">-->
    <style>
        @import "css/a.css";
    </style>
</head>
<body>

    <div>hello css</div>

</body>
</html>